PROBLEM TO BE SOLVED: To prevent a reduction in a recognition rate of a finger vein authentication device caused by erroneous insertion of a finger by a user who is unfamiliar with the finger vein authentication device or by insertion of a false finger by a malicious user, at low costs.SOLUTION: A personal authentication device is provided with: an imaging section for imaging a finger vein image a light source for emitting transmission light of a finger an image arithmetic section for performing verification of the finger vein image a guide section for indicating an imaging position of the finger a detection section for detecting contact of the finger with the guide section a light source for emitting reflection light irradiating a ball side of the finger switch sections that are pressed down by a tip portion of the finger a light source for emitting transmission light transmitting through the tip portion of the finger a light receiving element for receiving the transmission light transmitting through the tip portion of the finger display means for displaying information for guiding a user to proper use of the personal authentication device means for switching between 1-N authentication that performs verification of all registered images as targets in response stability of authentication and 1-1 authentication that inputs an ID number for identifying a user himself or herself beforehand and performs verification of an only registered image corresponding to the ID number as a target and means for updating registered data.COPYRIGHT: (C)2013,JPO&INPIT【課題】 装置に習熟していない利用者による指の誤挿入や、悪意のある利用者による偽造指の挿入などから、指静脈認証装置の認識率の低下を低コストで防止する。【解決手段】 指静脈画像を撮像する撮像部と、指の透過光を発光する光源と、画像の照合を行う画像演算部と、指の撮像位置を示すガイド部と、指とガイド部への接触を検知する検知部を設ける。さらに、指の腹側を照射する反射光を照射する光源と、指の先端部分によって押し込まれるスイッチ部と、指の先端部を透過する光源と、前記指の先端部を透過する光源を受光する受光素子とを設ける。さらに、装置の正規使用へ誘導する情報を示す表示手段を設ける。さらに、認証の安定性に応じて、全登録画像を対象に照合を行う1-N認証と事前に利用者本人を識別するID番号を入力しそれに対応した登録画像のみを対象に照合を行う1-1認証とを切り替える手段と登録データ更新を行う手段を設ける。【選択図】 図2
